A train attendant helps an elderly passenger get off train No. G3001 from Fuzhou of Fujian Province to Hong Kong after it arrived at West Kowloon Station in Hong Kong, south China, Sept. 23, 2018. The whole line of the Guangzhou-Shenzhen-Hong Kong Express Rail Link has been put into official operation, as the Hong Kong section of the high-speed railway went into service on Sunday morning. (Xinhua/Zhang Guojun)